2. Finance Receivables (Details-Allowance for finance credit losses) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Finance Receivables
Balance at beginning of period	$ 107,315	$ 90,168	$ 95,578	$ 75,603
Provision for credit losses on finance receivables	47,336	46,262	143,053	134,881
Charge-offs	(53,628)	(46,839)	(152,401)	(134,674)
Recoveries	7,596	7,252	22,389	21,033
Balance at end of period	$ 108,619	$ 96,843	$ 108,619	$ 96,843